This low cost preamplifier is designed for pulse counting of typical input signals for channel electron multipliers (CEMs) or photo multiplier tubes (PMTs).

Theoretical maximum count rate is 10e7 pulses per second, dead time and output pulse width are entirely independent of threshold setting and overdrive, but change slightly (+/- 20% max) with rate. The primary application therefore is pulse counting at not too high rates (some 10e5/s).

	Case	Units	Range
	Aluminium (RF-schielded)	mm	90 x 35 x 31
	Output to be connected to
	Electronic counter
	Input signal (negative pulse)
	Amplitude into 50 Ohm	mV	- 3 to - 1000
	Safe operation without damage	V	+/- 3
	Pulse width (FWHM)	ns	5 to 20
	Count rate (Poission distribution)	cps	up to 5 x 10e5
	Resistance, dc-coupled	Ohm	50
	Threshold, screwdriver adjustable	mV	-3 to - 130
	Output signal (positive pulse)
	Resistance	Ohm	50
	Amplitude into high Z load	V	2.2
	Amplitude into 50 Ohm	V	1.1
	Pulse width	ns	40 +/- 10
	Dead time	ns	80 +/- 20
	Power Supply
	A power supply for 100 - 240 V, 50/60 Hz is delivered with the PAD01S	V	+6 (+/- 5 %), 24 mA typ.
		V	- 6 (+/- 5 %), 14 mA typ.
	Temperature range
	For specified data	°C	10 - 40
	For operation	°C	0 - 70